Thanks. Fixed these issues.

-- Updating v11 branch on test server with: git pull

-- Launching index.php yields:
Critical error – bailing out
The top-level configuration file (_config.php) is missing. You probably have not yet installed, so run the installer.

Details here are intended only for the website/system-administrator, not for regular website users.
» If you are a regular website user, please let the website staff deal with this problem.

Depending on the error, and only if the website installation finished, you may need to edit the installation options (the _config.php file).

ocProducts maintains full documentation for all procedures and tools (including disaster recovery). These may be found on the Composr website. If you are unable to easily solve this problem, we may be contacted from our website and can help resolve it for you.

-- Launching install.php yields...
An error has occurred

PHP [1] Uncaught Error: Call to undefined function ocp_is_escaped() in /home/muchrgvj/public_html/sources/tempcode.php:2752 Stack trace: #0 /home/muchrgvj/public_html/sources/symbols.php(369): apply_tempcode_substitutions('<img class="ico...', Array) #1 /home/muchrgvj/public_html/sources/tempcode.php(2540) : eval()'d code(12): ecv('EN', Array, 4, 'INCLUDE', Array, 'INSTALLER_STEP_...') #2 /home/muchrgvj/public_html/sources/tempcode.php(2412): {closure}(Array, 'EN', '') #3 /home/muchrgvj/public_html/sources/tempcode.php(181): Tempcode->evaluate() #4 /home/muchrgvj/public_html/sources/tempcode.php(2540) : eval()'d code(34): otp(Object(Tempcode), 'INSTALLER_HTML_...') #5 /home/muchrgvj/public_html/sources/tempcode.php(2506): {closure}(Array, 'EN', '') #6 /home/muchrgvj/public_html/install.php(246): Tempcode->evaluate_echo() #7 {main} thrown
Here is the stack trace:

Below is a stack trace revealing the state Composr was in when the error occurred. If this represents a bug in the unmodified software, you may want to check Composr website for a fix, and if there isn't one, report this as a bug. Please note that merely posting a stack trace is not sufficient for us to solve your problem; the stack trace is just an aid that presents us with additional information. We still need to know the error message, what you tried to do, how you tried to do it, version numbers, and any other appropriate information.
We apologize for this problem and if it's a bug we hope you will work with us so that we can fix it for you promptly.
File '/home/muchrgvj/public_html/sources/minikernel.php'
Line '546'
Function 'get_html_trace'
Args
File '/home/muchrgvj/public_html/sources/minikernel.php'
Line '675'
Function 'fatal_exit'
Args

'PHP [1] Uncaught Error: Call to undefined function ocp_is_escaped() in /home/muchrgvj/public_html/sources/tempcode.php:2752 Stack trace: #0 /home/muchrgvj/public_html/sources/symbols.php(369): apply_tempcode_substitutions(\'<img class="ico...\', Array) #1 /home/muchrgvj/public_html/sources/tempcode.php(2540) : eval()\'d code(12): ecv(\'EN\', Array, 4, \'INCLUDE\', Array, \'INSTALLER_STEP_...\') #2 /home/muchrgvj/public_html/sources/tempcode.php(2412): {closure}(Array, \'EN\', \'\') #3 /home/muchrgvj/public_html/sources/tempcode.php(181): Tempcode->evaluate() #4 /home/muchrgvj/public_html/sources/tempcode.php(2540) : eval()\'d code(34): otp(Object(Tempcode), \'INSTALLER_HTML_...\') #5 /home/muchrgvj/public_html/sources/tempcode.php(2506): {closure}(Array, \'EN\', \'\') #6 /home/muchrgvj/public_html/install.php(246): Tempcode->evaluate_echo() #7 {main} thrown'
File '/home/muchrgvj/public_html/sources/minikernel.php'
Line '624'
Function 'composr_error_handler'
Args

1

'Uncaught Error: Call to undefined function ocp_is_escaped() in /home/muchrgvj/public_html/sources/tempcode.php:2752 Stack trace: #0 /home/muchrgvj/public_html/sources/symbols.php(369): apply_tempcode_substitutions(\'<img class="ico...\', Array) #1 /home/muchrgvj/public_html/sources/tempcode.php(2540) : eval()\'d code(12): ecv(\'EN\', Array, 4, \'INCLUDE\', Array, \'INSTALLER_STEP_...\') #2 /home/muchrgvj/public_html/sources/tempcode.php(2412): {closure}(Array, \'EN\', \'\') #3 /home/muchrgvj/public_html/sources/tempcode.php(181): Tempcode->evaluate() #4 /home/muchrgvj/public_html/sources/tempcode.php(2540) : eval()\'d code(34): otp(Object(Tempcode), \'INSTALLER_HTML_...\') #5 /home/muchrgvj/public_html/sources/tempcode.php(2506): {closure}(Array, \'EN\', \'\') #6 /home/muchrgvj/public_html/install.php(246): Tempcode->evaluate_echo() #7 {main} thrown'

'/home/muchrgvj/public_html/sources/tempcode.php'

2752
Function 'catch_fatal_errors'
Args

Version 11 alpha1
Composr, created by ocProducts

-- error_log says:
[27-Mar-2021 08:19:25 UTC] PHP Fatal error: Uncaught Error: Call to undefined function ocp_is_escaped() in /home/muchrgvj/public_html/sources/tempcode.php:2752
Stack trace:
#0 /home/muchrgvj/public_html/sources/symbols.php(369): apply_tempcode_substitutions('<img class="ico...', Array)
#1 /home/muchrgvj/public_html/sources/tempcode.php(2540) : eval()'d code(12): ecv('EN', Array, 4, 'INCLUDE', Array, 'INSTALLER_STEP_...')
#2 /home/muchrgvj/public_html/sources/tempcode.php(2412): {closure}(Array, 'EN', '')
#3 /home/muchrgvj/public_html/sources/tempcode.php(181): Tempcode->evaluate()
#4 /home/muchrgvj/public_html/sources/tempcode.php(2540) : eval()'d code(34): otp(Object(Tempcode), 'INSTALLER_HTML_...')
#5 /home/muchrgvj/public_html/sources/tempcode.php(2506): {closure}(Array, 'EN', '')
#6 /home/muchrgvj/public_html/install.php(246): Tempcode->evaluate_echo()
#7 {main}
thrown in /home/muchrgvj/public_html/sources/tempcode.php on line 2752

https://compo.sr

Thanks. Fixed.