Apache error log on server

Hi,

I see lots of errors with theme in Apache error log:
[Mon Apr 26 00:18:13.914739 2021] [proxy_fcgi:error] [pid 20394:tid 139993376810752] [client 144.76.60.198:54860] AH01071: Got error 'PHP message: PHP Warning: Undefined variable $prev_class in /home/546626.cloudwaysapps.com/muxfghuehd/public_html/w..............d-cloud-library/state/date/tdb_state_date.php on line 120PHP message: PHP Warning: Undefined variable $next_class in /home/546626.cloudwaysapps.com/muxfghuehd/public_html/wp-content/plugins/td-cloud-library/state/date/tdb_state_date.php on line 121'
[Mon Apr 26 00:18:37.844803 2021] [proxy_fcgi:error] [pid 20394:tid 139993334847232] [client 207.46.13.87:54888] AH01071: Got error 'PHP message: PHP Warning: Attempt to read property "slug" on null in /home/546626.cloudwaysapps.com/muxfghuehd/publi..............block.php on line 202PHP message: PHP Warning: Attempt to read property "ID" on null in /home/546626.cloudwaysapps.com/muxfghuehd/public_html/wp-content/plugins/td-composer/includes/tdc_composer_block.php on line 202PHP message: PHP Warning: Attemp
[Mon Apr 26 00:18:38.072243 2021] [proxy_fcgi:error] [pid 20394:tid 139993334847232] [client 207.46.13.87:54888] AH01071: Got error 's/tdc_composer_block.php on line 202PHP message: PHP Warning: Attempt to read property "ID" on null in /home/546626...............cy/common/wp_booster/td_block.php on line 1554PHP message: PHP Warning: Attempt to read property "ID" on null in /home/546626.cloudwaysapps.com/muxfghuehd/public_html/wp-content/plugins/td-composer/legacy/common/wp_booster/td_block.php on line 1554'
[Mon Apr 26 00:18:44.843007 2021] [proxy_fcgi:error] [pid 20394:tid 139993460737792] [client 40.77.167.107:54888] AH01071: Got error 'PHP message: PHP Warning: Attempt to read property "slug" on null in /home/546626.cloudwaysapps.com/muxfghuehd/publ.............._block.php on line 202PHP message: PHP Warning: Attempt to read property "ID" on null in /home/546626.cloudwaysapps.com/muxfghuehd/public_html/wp-content/plugins/td-composer/includes/tdc_composer_block.php on line 202PHP message: PHP Warning: Attem
[Mon Apr 26 00:18:45.068332 2021] [proxy_fcgi:error] [pid 20394:tid 139993460737792] [client 40.77.167.107:54888] AH01071: Got error 's/tdc_composer_block.php on line 202PHP message: PHP Warning: Attempt to read property "ID" on null in /home/546626..............cy/common/wp_booster/td_block.php on line 1554PHP message: PHP Warning: Attempt to read property "ID" on null in /home/546626.cloudwaysapps.com/muxfghuehd/public_html/wp-content/plugins/td-composer/legacy/common/wp_booster/td_block.php on line 1554'
[Mon Apr 26 00:18:47.924295 2021] [proxy_fcgi:error] [pid 20394:tid 139993410381568] [client 40.77.167.74:54888] AH01071: Got error 'PHP message: PHP Warning: Attempt to read property "slug" on null in /home/546626.cloudwaysapps.com/muxfghuehd/publi..............block.php on line 202PHP message: PHP Warning: Attempt to read property "ID" on null in /home/546626.cloudwaysapps.com/muxfghuehd/public_html/wp-content/plugins/td-composer/includes/tdc_composer_block.php on line 202PHP message: PHP Warning: Attemp
[Mon Apr 26 00:18:48.143685 2021] [proxy_fcgi:error] [pid 20394:tid 139993410381568] [client 40.77.167.74:54888] AH01071: Got error 's/tdc_composer_block.php on line 202PHP message: PHP Warning: Attempt to read property "ID" on null in /home/546626...............cy/common/wp_booster/td_block.php on line 1554PHP message: PHP Warning: Attempt to read property "ID" on null in /home/546626.cloudwaysapps.com/muxfghuehd/public_html/wp-content/plugins/td-composer/legacy/common/wp_booster/td_block.php on line 1554'

Could help me in investigation?

Thank you,
Michal

I have also 100% CPU usage on server whenever I enter the wordpress post editor. After restarting the server it is normal till I enter the edition of post. Since that 100% CPU usage it is.

Also I receive alert from WordPress
Since WordPress 5.2 there is a built-in feature that detects when a plugin or theme causes a fatal error on your site, and notifies you with this automated email.

Error Details
=============
An error of type E_ERROR was caused in line 2937 of the file /home/546626.cloudwaysapps.com/muxfghuehd/public_html/wp-content/plugins/td-composer/legacy/common/wp_booster/td_util.php. Error message: Out of memory (allocated 12582912) (tried to allocate 40960 bytes)


I have met the requirement of all settings.
http://prntscr.com/127r85q

I checked it once again. And I can reproduce error every time I just enter the “Edit Post” in wordpress.
Whenever I done that I’m receiving alerts like below:
Error Details
=============
An error of type E_ERROR was caused in line 2934 of the file /home/546626.cloudwaysapps.com/muxfghuehd/public_html/wp-content/plugins/td-composer/legacy/common/wp_booster/td_util.php. Error message: Out of memory (allocated 35651584) (tried to allocate 40960 bytes)

And CPU usage is 100% till I restart the server.

If you need any more logs I can gather it.

[Wed Apr 28 03:19:22.148983 2021] [proxy_fcgi:error] [pid 24049:tid 140277716739840] [client 95.91.76.7:21398] AH01071: Got error 'PHP message: PHP Warning: Attempt to read property "slug" on null in /home/546626.cloudwaysapps.com/muxfghuehd/public_..............ock.php on line 202PHP message: PHP Warning: Attempt to read property "ID" on null in /home/546626.cloudwaysapps.com/muxfghuehd/public_html/wp-content/plugins/td-composer/includes/tdc_composer_block.php on line 202PHP message: PHP Warning: Attempt
[Wed Apr 28 03:19:22.369949 2021] [proxy_fcgi:error] [pid 24049:tid 140277716739840] [client 95.91.76.7:21398] AH01071: Got error 's/tdc_composer_block.php on line 202PHP message: PHP Warning: Attempt to read property "ID" on null in /home/546626.cl..............cy/common/wp_booster/td_block.php on line 1554PHP message: PHP Warning: Attempt to read property "ID" on null in /home/546626.cloudwaysapps.com/muxfghuehd/public_html/wp-content/plugins/td-composer/legacy/common/wp_booster/td_block.php on line 1554'