Urgent Help Required Please re Wordpress & Ultimate addons for WP Builder

Had this error code come up on a Parallax plug-in purchased from Envato many years back. Notice : Function _load_textdomain_just_in_time was called incorrectly . Translation loading for the parallax domain was triggered too early. This is usually an indicator for some code in the plugin or theme running too early. Translations should be loaded at the init action or later. Please see Debugging in WordPress for more information. (This message was added in version 6.7.0.) in /home/favourit/public_html/wp-includes/functions.php on line 6121

The parallax system is linked to the images (naturally) so by deactivating it I lose the images. I have purchased the newer Ultimate addons for WP Builder which includes a parallax system, BUT it fails to load…giving me the following error messages:

Notice : ob_end_flush(): failed to send buffer of zlib output compression (0) in /home/favourit/public_html/wp-includes/functions.php on line 5471

The package could not be installed. No valid plugins were found.

Notice : ob_end_flush(): failed to send buffer of zlib output compression (0) in /home/favourit/public_html/wp-includes/functions.php on line 5471

Plugin installation failed.

Notice : ob_end_flush(): failed to send buffer of zlib output compression (0) in /home/favourit/public_html/wp-includes/functions.php on line 5471

Can any techies help me out please?

I have fixed couple of weeks ago a similar issue for a client regarding to the out-dated theme, as this would require to invest some time and updates, I don’t think anyone would offer “free solution” but if you’re interested in paid support/work, I can schedule the work for the weekend.

Contact me if you’re interested in, otherwise, good luck