Only limited access to Elementor admin settings?

In trying to change the theme of the main site of a multisite on WP 5.7 to Leverage theme v2.1.1 while in maintenance mode with plugin Acurax Coming Soon / Maintenance,

I installed Elementor v3.25 but in the Elementor plugin admin settings, I only have access to the FIRST TAB of every settings panel:
Under Elementor Settings, I can only access the General settings tab, not Styles or Advanced.
Same in the Tools window, so I cannot access Replace URL tab or Maintenance Mode.
I have no access to any option settings in Role Manager either!

It makes no difference if Elementor Pro is activated or not.

Now, Elementor pages load fine and the Elementor sidebar editor works.

So things I already tried:

-Updated Apache server specs (php7.4.19) to this:
<IfModule php7_module>
php_flag display_errors On
php_value max_execution_time 120
php_value max_input_time 60
php_value max_input_vars 6000
php_value memory_limit 128M
php_value post_max_size 60M
php_value session.gc_maxlifetime 1440
php_value session.save_path “/var/cpanel/php/sessions/ea-php72”
php_value upload_max_filesize 50M
php_flag zlib.output_compression On

-Swittch theme to twentysixteen, but no jQuery loaded,
switched to Twenty Twenty, with and without Leverage Extra theme function plugin active, but no result.

-Tried deactivating all non-essential plugins, but left all network activated multiste related plugins…
no result.

-Changed permalink settings to plain (temporarily)
-also flushed permalinks in site health.

-Changed site language from Spanish to English

-Tried to revise settings on Really Simple SSL, but to no avail, since I cant access the URL option under Elementor, so I deactivated it on the entire site. Then reactivated it network wide.
Still no change

-I flushed the browser cache in between almost every attempt above.
Nada.

Only related PHP error I found was:
PHP Notice: Undefined offset: 0 in /home/xxxxx/public_html/wp-content/plugins/elementor/modules/system-info/reporters/user.php on line 69
after I went to reload the Sys Info

I have no cache plugin active, no CDN, no custom JS code, nor membership plugin, apart from Buddypress (network activated).

So, anybody run into this before?

What am I missing here?

Thanks in advance!