Clear PowerAppsCache to save site as template: The file path is too long

When I try to save the site as a template (not including Content), I get error message 'qModules\Files\Lists\xxxxxxx xxxxxx\_PowerAppsCache\xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx_xxxxxxxxxxxxxxxxxx\Assets\Images\xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx.png.appfile'. Please make folder or file names shorter in the site and then try exporting the site again."

From what I understand I need to clear PowerApps cache (my site contains dozens of custom forms). Is there any way to do it? Thanks