Cyberg Studio AS

No worries. We've all been there 😉 
If you haven't already and are leaving the RECOVERY_MODE commented out, I'd advise implementing RECOVERY_MODE correctly. Just in case you need it one day so you don't run into this again.

Glad to hear you found the issue and thanks for sharing/explaining what you found!

Update!
I have found the problem and solved it. 
It was a feature in CloudFlare that apparently conflicted with the API-call settings -- "Super Bot Fight Mode" was enabled and set to: Definitely automated (definitely automated traffic typically consists of bad bots) 
Selected action for this traffic was set to BLOCK. (mistakingly) blocking the access to /api MENU page.

NB!!!  In case you get any of these support requests in the future.
- WAF rules do not override the settings of the Bot Fight Mode, so if you whitelist i.e. Hosting IP or URL/FULL URL it still get's blocked. 
- This feature does not get disabled when "Pause Cloudflare on Site" under Advanced Settings is enabled either.

It does not. 

Disable Rocket Loader and/or HTML Compression.

Problem solved:
Seems like som caching problems with cloudflare. Turned on Development mode // Purge all cached files and hard reloaded the current page/browser cache (Ctrl+F5) = fixed 
 

Click on reset default config.  It will mean you have to fix any extra buttons you've added or rearranged.  
I've had that happen a few times with custom third party buttons that went wonky eventually.  

Have you tried disabling your third party resources (apps and plugins) then clearing the system cache in the support section of the ACP?

This is why you ban ASN. Banning CIDR's will do no good and eventually it will take toll on CPU consumption on your server. However, if you do ban IP address, make sure to block at PREROUTING / RAW so it's quick and fast. 

Cloudflare R2 is a storage method like Amazon S3 and both are Api Compatible.
R2 is a lot cheaper than S3, there are the prices:

Would it be viable for IPS to add support for it?
It would be a really upgrade for IPS self hosting clients, since in R2 bandwidth is free, we only pay for storage and operations.  

Yes, find reputable and recognized places for knowledge, just as you'd search for any other product or service online. 🙂
Depending on your learning style, seek out paid or free training/courses from reputable providers (consider looking into MOOCs) or go straight to the source for documentation:
PHP: https://www.php.net/docs.php MySQL: https://dev.mysql.com/doc/ Javascript: https://developer.mozilla.org/en-US/docs/Web/JavaScript HTML/CSS: https://www.w3.org/standards/webdesign/htmlcss

After 5 years or maybe even more of using Invisioncommunity packages until 4.6+ I was pretty happy with everything. Now there are some new updates coming out every now and then.. Especially now with the latest update 4.7 a lot of plugins aren't working anymore. I have this problem with "Couldn't get the list of blocks.." on manage blocks on 3 or 4 suites.

The suggestion for today is:
Plugins such as, 'General Statistics', 'Who Was Online', 'Group Name Indicator' should be directly implemented to the invision community packages for installation.
It would help a lot of community owners and even businesses with these plugins.. Because with all the updates going on now, we get new features but also a lot of problems for current plugins already installed on our website.

Please consider my suggestion and try implementing it. As a invisioncommunity client I'm pretty satisfied with the services provided, but we need a little bit more.

Hi shahed,
Thanks for the suggestion.
This has also been on my mind for quite a while and is on my todo list for a future update. 🙂

Hello Invision,
For easier modding, please consider giving every parent elements in IPS Default Theme unique IDs, or any type of attribute to distinguish them. time and time again in the past, I had  problems for modding, and anchoring to CSS selectors in templates. most of the time find a way to get around, but sometimes in one template there are just several exact element with same CSS selectors used as parent for different sections. these parts without any given ID is virtually impossible to anchor and causes repeats. if all parent elements given it's own IDs or again any type of attribute to make them unique, that just make a big help and can be use in all sorts of ways.
@Rikki@Ehren

I see Cloudflare recently released their own Captcha. Just wondering if IPS is going to implement it as an option in the future? I see their competitor has implemented it in an upcoming release. 
Read more here...
Announcing Turnstile, a user-friendly, privacy-preserving alternative to CAPTCHA (cloudflare.com)