For bug report, lease log a ticket with us by providing tmp root ssh access to your server.
https://openlitespeed.org/kb/submit-openlitespeed-bug-report/
It looks like LiteSpeed cache plugin for WordPress related instead of OLS related. If not, What command did you run to reproduce it on OLS( trying to install ModLSPHP by running the ./build.sh script.) we are not clear about what steps you did.
Can you tell me what's your goal? Do you want to enable some CDN service to avoid connection drop?
or you want to visist some domain such as example.com only by your ip, no one else?
Or you want to whitelist your IP from recaptha security feature?
https://openlitespeed.org/kb/recaptcha-with-openlitespeed/ You may need to choose either through admin console control or rewrite rule control, but not both at the same time.
You should create a separate thread since you are a different question. There is no way for condition match for such option on OLS. You may need to find an alternative way to achieve your goal.
It depends on how you install OLS, such as yum install OLS or through binary package,
then you can continue to do so through yum update, or lsup.sh
Check details here
https://openlitespeed.org/kb/how-to-upgrade-openlitespeed/
How did you set it on OLS? The apache like header directive won't work on OLS for sure. You will need to follow OLS KB to do so. https://openlitespeed.org/kb/
You should check your server load and PHP progress to see if they jumped too high during the process. If so, could possibly some bug on elementor to trigger some inifinte loop etc.
Correct. OLS only support rewrite rule in .htaccess and doesn't support all the rest apache directives at all.
To set header, please try https://openlitespeed.org/kb/setting-up-cors-on-openlitespeed/
Which url triggerred the error? You may need to access the URL directly from your browser to web server to see any issue. It could be many reason to fail the connection, not necessary on OpenLiteSpeed side. You will need to run more test to narrow the issue.
For OpenLiteSpeed, you can check KB at https://openlitespeed.org/kb/, you can get any OS and install openlitespeed on top of it, or use 1-click installation script, or just install cyberpanel with OLS, or lunch from google Cloud image.