PHP-FPM breaks with hammerton - plesk server

[deepakjoshi6355]

Hi,

Server is running with plesk and using hammerton which not giving desire output and breaking somewhere.

Plesk (plesk-web-hosting 17.8) is enabled and running
Plesk-FPM (5.6, 7.0, 7.3) is enabled and running

htlook -p

Downloading php_fpmpal tool ...

===== List of PHP-FPM pools =====
[...]
--- domain ---
Total memory used: 0 MB Processes: 0 (max_children: 5) Ave. process: Runtime error (func=(main), adr=3): Divide by zero
(standard_in) 1: syntax error
MB
(standard_in) 2: syntax error
bash: line 232: let: total_phpfpm_mem_usage_average_process+=: syntax error: operand expected (error token is "+=")
--- hillcannon.com ---
Total memory used: 0 MB Processes: 0 (max_children: 5) Ave. process: Runtime error (func=(main), adr=3): Divide by zero
(standard_in) 1: syntax error
MB
(standard_in) 2: syntax error
bash: line 232: let: total_phpfpm_mem_usage_average_process+=: syntax error: operand expected (error token is "+=")

Thanks.