1. PHP REQUIREMENT LINK : https://doc.livehelperchat.com/docs/install/ and also check composer.json
2. We have made small change in lib/core/lhcore/lhupdate.php file given by vendor in 3.14 version because it was giving error on upgrade.
3. If you get .htaccess: Invalid command 'Header', perhaps misspelled or defined by a module not included in the server configuration on ampps, please enable 'mod_headers' i.e uncomment
'LoadModule headers_module modules/mod_headers.so' in httpd.conf.
4. No need to define variable for 'fcm_key' in `lh_chat_config` table as it's same for all installations and is defined in /modules/lhinstall/install.php(Since 3.40).
5. Keep 'site_address', 'trusted_host_patterns' settings blank in settings.ini.php. 
6. Changed to min php 7.4.0 in info.xml on vendor request(via email), also there was issue while installing on PHP 7.2. Vendor has said that he will update the same in official docs i.e https://doc.livehelperchat.com/docs/install/
7. Since version 4.30 download, {{version-number}v-with-dependencies.zip from Github releases as this package has composer dependencies included.
8. Vendor has not provided the package with all the dependecies in 4.36 version Hence we have downloaded the dependencies using composer as suggested by vendor over email in 4.33 version.
(Same done in 4.74)