Problems moving Contao to different subdirectory

[etsauer]

Hello.

While trying to migrate Contao to one subdirectory to another, I came across this Warning on the home page:

Warning: imagejpeg() [function.imagejpeg]: Unable to open '~/public_html/site/system/html/012-a7f8d5dc.jpg' for writing: Permission denied in ~/public_html/site/system/libraries/Controller.php on line 946

I am assuming this is a reference to a temporary file form the old directory, and is no longer valid. My question is, how can I safely clean this up so that those temp files will be re-generated?

EDIT: Tried to go through "Maintenance" -> "Purge Data" in the new directory and got Permission Denied. However, in the original directory, "Purge Data" works just fine. Checked file permissions and both directories are the same: 755

Thanks

[SuperMatz]

Did you remember to change the "Relative path to the Contao directory" under "Global configuration" in the Settings (or in your "localconfig.php" if you prefer)?

[etsauer]

Yes, I did change the relative path in settings.

[ramjet]

and in .htaccess?

[etsauer]

There is no .htaccess in use.

[ramjet]

have you used the contao-check tool to check everything? ..it should pick up any wrong permissions and missing/corrupt files.