Makoto

When upgrading, you don't want to skip uploading files that exist, you always want to overwrite existing files. Doing this will lead to broken upgrades.

Completely off-topic, but for what it's worth, I strongly encourage you to find another password manager as LastPass has been subject to multiple security incidents in recent years. DashLane and BitWarden are both great alternatives if you'd like to consider switching.

I have no idea why you would be missing database tables for the pages application without explicitly uninstalling it, the table you're showing as missing shouldn't be a new table or anything of the sort that I'm aware of. IPS should not touch the table when upgrading other applications. Are you able to access phpMyAdmin or any other database management utility on your server (including the MySQL command line if you're comfortable using it) and show us all database tables you have on your forum that have ccs_ in the table name? What happened immediately prior to your forum going down entirely? Did you try and change or upgrade anything?

Are you using any type of anti-virus that injects JavaScript into the web pages you visit by chance? If you are using McAfee, KasperSky or so on, try temporarily disabling it and see if you still have any issues. If that doesn't work, try disabling any ad blocking or similar plugins in your web browser. Additionally see if the issue also persists in an incognito window. Edit: Just saw you said it works fine in Chrome, so your AV probably isn't the issue, which leaves browser plugins/ad blockers as the next most likely culprit.

It looks like you're probably having JavaScript issues somewhere then that isn't caused by outdated cache or a theming issue, which could mean a third-party plugin or application is causing the issue. Are you able to provide a link to the forum by chance, and can this be replicated by a newly registered user if the forum is public?

Does this issue persists when using the default IPS theme as well?

Try going to the Get Support page at the bottom of the Systems tab (the default tab) in your AdminCP, and then look for the Clear System Cache button and click it. Once you do that, reload the page and see if that resolves the issue you are having.

If you are getting this when visiting /admin/upgrade/, something must have broken with your install. You may need to uninstall and reinstall the pages application. This will result in lost data on your pages application, however it looks like your pages database tables are somehow already missing.

You can download a copy of IPS and all your purchased applications from the client area here: https://invisioncommunity.com/clientarea/ Click on the license you wish to use, and there will be a download button at the top of the page. Extract this, and upload everything in the applications/cms folder to your live installation. It is safe to overwrite any existing files. Once you do this, go into the AdminCP again and you should see an option to upgrade your pages installation.

When the site is offline, you really don't want people accessing any non-static pages whatsoever. What is on the plugin page that you are wanting guests to have access to?

I'm sure you've already tried, but I would definitely keep trying to follow up with the provider your current domain is at to see if there's anything you can do to regain access to your account. Outside of that, the steps above should take care of most everything you need to do to transfer. When I'm back at my work machine I'll see if I can dig up the SQL query you can use to replace references to your old domain in posts and comments as well.

The main thing you need to do is update the board URL in the conf_global.php file located in the root of your installation. This will take care of most things for you. If you have any custom domains set up in your file storage configurations (if you don't know, you probably don't), you'll need to update those as well. EDIT: If this is just a domain for testing and not an actual domain migration, you can ignore everything below. You'll also need to reset your license URL in the client area after the move. Updating conf_global.php does not update any hard links to your old domain in posts or elsewhere within your community, so you'll want to set your old domain up to redirect to your new one to accommodate for this, and ideally keep it registered for at least 3 or so years to give everyone plenty of time to transition. If you want to let the old domain expire, you'll probably want to have any links to your old domain replaced in posts and etc., which can be done with an SQL query and then updating your search index. But save this step for last and make sure everything else is working on the new domain first.

Are you sure these members themselves aren't simply opting out of notifications in the forum via email or by manually in following the forum? Have you talked with any of the people removed to confirm whether or not they unsubscribed from following this forum deliberately?

Is that what you see when you get the 429 error? You'll need to have the networking tab open and then refresh the page so that it gives you a 429 error again, which will mean re-enabling the problem applications.

Rate limits can be triggered by bugs in an application which cause redirect loops. Your browser terminates these at around 10 requests or so, but a web server can terminate it before it reaches that point with a 429.

Ah, sorry, it's the "HTML" button on Firefox, otherwise it's mostly the same process. The bit on the right where it shows "GET" and then the URL is what you want to look for. If you're getting a redirect loop, you'll see the network tab get spammed quickly with requests for the same couple pages back and forth. If it's a plugin or application, it could give you a hint as to what application is doing it, and might help us narrow down what exactly is going wrong. It might not though. Applications trying to manage redirects and such in the ACP isn't common and I don't know of any off the top of my head that do this. Re-enabling them one by one might be an easier way to identify which one is doing it.

It is definitely the result of a third-party application then, yes. The developer console is a bit intimidating, but you should see something like this. If you click the "doc" button outlined, it will filter everything out to just page requests, From there, you can click on an entry and find the page it is trying to request, Again, don't post the full URL or screenshot here, but you could use this to help identify if it's trying to redirect you to a specific application or plugins page. Alternatively, you can re-enable your plugins and applications one by one and see which one ends up causing the issue that way.

Is it when you try and access the AdminCP whatsoever, or after you sign-in to the AdminCP? If you press SHIFT+CTRL+I and navigate to the network tab when trying to load the page again, do you see it cycling between the same two pages repeatedly? (Don't post your full Admin URL here, but do you see it trying to switch between http and https, or is it trying to navigate to one page and back to another?)

Looks like a potential compatability issue with this plugin, Can you try disabling it and see if the error goes away?

It might be that they are transferring the photos from their iphone to other devices in some other manner, and then trying to upload the images on non-iphone devices? That could be what's happening instead of them uploading straight from their phone. It could also be that this auto conversion only happens in more modern versions of iOS. I have no idea honestly since I have no apple products. But if multiple users on your forums are reporting it as an issue it could be worth having a plugin made for it.

Even CloudFlare appears to have zero support for it, https://developers.cloudflare.com/images/faq/#can-cloudflare-images-use-the-heic-heif-format Honestly not sure it's worth the hassle. Are you seeing these images posted a lot on your community, or just once in a blue moon? If ImageMagick supports the format you could theoretically just have them converted to another format. I believe a plugin could accomplish this. But if it's not a common issue I wouldn't personally bother.

MySQL makes for a really bad search engine. It is not good at search performance and there is no way to make it such. You can make it less bad, but it's still bad. Outside of ramping up your hardware, there's not much that can be done software side in regards to MySQL search performance. IPS does, however, support using ElasticSearch as an alternative, which is substantially faster and more accurate in regards to searching. You'll need a good amount of RAM/server memory to run it on larger forums, but it's the next best step to take to address the performance issues you're seeing with the search table. It's also worth noting even outside of search, these kind of queries can tie up available MySQL connections and other system resources, which can make your site slow outside of searching.

If this is self-hosted, can you check and verify the file permissions are correct and that PHP/IPS has full read/write permissions to the datastore/ directory where IPS is installed?

@Alexander Yuganov When you're on the edit screen for your theme as shown in the original screenshot, add this at the end of the URL after the "&id=<your_theme_id>", &t_type=css&t_app=core&t_location=global&t_group=framework&t_name=data-lists.css Then hit enter and you should have the data-lists.css file open in your editor. You can then just click the revert button, and it'll reset back to the default layout, or compare between the two files and see if there are any tweaks you may need to port over to your custom.css file. I recommend making a backup in a local text editor before you revert, just in-case reverting breaks something in your custom template. Also note you don't need to hit save after hitting revert, as doing this will just mark the CSS file as modified again.

What folders and files are you referencing specifically that you believe should be deleted, and how are you synchronizing the changes?