I'm trying to do a install for the first time and I'm getting this error 

PHP Fatal error:  Class 'IPS\Http\Url\Internal' not found in /home/sexclubn/public_html/system/Http/Url.php on line 249

It seems that some files are missing on your Webserver. I would suggest to upload the whole package one more time.

Now I get this

after install completed I get error 
EX0 Class 'IPS\Content\Search\Index' not found

 

33 minutes ago, manuel lazanakis said:

Now I get this

after install completed I get error 
EX0 Class 'IPS\Content\Search\Index' not found

 

Can you navigate to this location: /System/Content\Search and look if the Index.php file is present there? If it is missing, upload it from the forum package.

yes it is present i have installed the software but not i get errors when i change category names and when clicking on activity stream.

12 hours ago, manuel lazanakis said:

yes it is present i have installed the software but not i get errors when i change category names and when clicking on activity stream.

What errors? Are they similiar of the one that you posted above? In that case I think that you must reupload all the files again as most likely a lot of them were not uploaded properly the first time.

When I uploaded the files I saved them to Dropbox and the file names got changed to capital letter and that's what causes the errors I have fixed the file names and everything works fine now

1 hour ago, manuel lazanakis said:

When I uploaded the files I saved them to Dropbox and the file names got changed to capital letter and that's what causes the errors I have fixed the file names and everything works fine now

Thanks for your update. Wow, that's a bummer.Never heard of dropbox doing this, so it's always useful to get such replies.