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Hello all, I am writing after searching solution for 3 days! 
Server detail: Ubuntu 22.04 (Cloud Panel)
Prestashop: 8.1.2 version
Purchased and installed ECOLIFE theme! 

After some settings in backend, the translation window is gone. (Please refer to attached photo) 
What I have done so far to tackle the problem!
I have run phppsinfo.php and in Directories section, the app/Resources/translations is showing not writable! 
Checked folder permission: for app/resources, it is 775 

Run server ngixn error log: 
2024/01/08 23:58:05 [info] 18003#18003: pagespeed: rollback gzip, explicit configuration in /etc/nginx/nginx.conf:107
2024/01/08 23:58:06 [info] 18141#18141: [ngx_pagespeed 1.15.0.0-8917] No threading detected. Own threads: 1 Rewrite, 1 Expensive Rewrite.
2024/01/08 23:58:06 [info] 18156#18156: [ngx_pagespeed 1.15.0.0-8917] No threading detected. Own threads: 1 Rewrite, 1 Expensive Rewrite.
2024/01/08 23:58:06 [info] 18141#18141: pagespeed: rollback gzip, explicit configuration in /etc/nginx/nginx.conf:107
2024/01/08 23:58:06 [info] 18155#18155: [ngx_pagespeed 1.15.0.0-8917] No threading detected. Own threads: 1 Rewrite, 1 Expensive Rewrite.
2024/01/08 23:58:06 [info] 18156#18156: pagespeed: rollback gzip, explicit configuration in /etc/nginx/nginx.conf:107
2024/01/08 23:58:06 [info] 18155#18155: pagespeed: rollback gzip, explicit configuration in /etc/nginx/nginx.conf:107
2024/01/09 06:20:24 [notice] 28883#28883: signal process started
2024/01/09 09:06:04 [info] 32200#32200: [ngx_pagespeed 1.15.0.0-8917] No threading detected. Own threads: 1 Rewrite, 1 Expensive Rewrite.
2024/01/09 09:06:04 [info] 32200#32200: pagespeed: rollback gzip, explicit configuration in /etc/nginx/nginx.conf:107

on nginx.conf: 107 line; the gzip is on; ( I have tried to turn off no difference, turned on back) 

Can you guide me what should I do from there? 
I realy started it thing like a month ago. A lot of things are new too me. Please be plain in your explanation. 
I really appraciate your help!