Unyson Plugin Extensions don’t work -websiste broken

Hi,

after the new SP Update the Unyson Plugin broke my whole website. It isn’t compatible anymore. The page breaks even if it’s the only activated plugin. I use the VortexVersion: 1.0.3
“By 2Theme” theme, which needs the extensions, and doesn’t work without.

Therefore, I tried to instal one of the older Unyson versions, but then I cannot add the extensions and always get this error:

“Cannot create temporary directory: /……../wp-content/plugins/unyson/tmp”

I already tried to create a temp folder by adding this to the config-php:
“define(‘WP_TEMP_DIR’, dirname(FILE) . ‘/wp-content/temp/’);

How can I restore the website?

Cheers,
Johannes