I have installed the plugin on another instance of SuiteCRM 8.6.1 running Apache and PHP 8.2
I have a similar problem where the Bulk SMS feature isn't displayed in the Accounts/Contacts/Cases/Leads/Meetings/Calls modules.
Looking at the Apache error log, I see messages related to an undefined array key in the Twilio plugin config file. See below. Please let us know if you're able to fix this problem
[Tue Sep 24 13:20:28.731281 2024] [php:warn] [pid 797] [client ::41638] PHP Warning: Undefined array key "phone_mobile" in /var/www/html/public/legacy/custom/modules/Administration/tac_twilio_config.php on line 72, referer: https:///legacy/index.php?module=Administration&action=tac_twilio_config
[Tue Sep 24 13:20:28.731291 2024] [php:warn] [pid 797] [client ::41638] PHP Warning: Undefined array key "phone_mobile_c" in /var/www/html/public/legacy/custom/modules/Administration/tac_twilio_config.php on line 72, referer: https:///legacy/index.php?module=Administration&action=tac_twilio_config
[Tue Sep 24 13:20:28.731403 2024] [php:warn] [pid 797] [client :41638] PHP Warning: Undefined array key "phone_alternate" in /var/www/html/public/legacy/custom/modules/Administration/tac_twilio_config.php on line 72, referer: https:///legacy/index.php?module=Administration&action=tac_twilio_config