[dziobak]

Djhifi.
I use exactly 8.1.1 on RPi2:

15:40:16.866 T:1945649264 NOTICE: Kodi compiled Aug 29 2017 by GCC 6.2.0 for Linux ARM 32-bit version 4.9.43 (264491)
15:40:16.866 T:1945649264 NOTICE: Running on LibreELEC (official): 8.1.1 8.2, kernel: Linux ARM 32-bit version 4.9.43

I look at your logs, and something is with php interpreter download, or renaming downloaded file:

PHP Code:

19:08:57.991 T:140399720662784   DEBUG: [Light IMDb Ratings Update] - Downloading and installing php-cgi_5.6_x86_64...
19:08:57.994 T:140399720662784   ERROR: EXCEPTION Thrown (PythonToCppException) : -->Python callback/script returned the following error<--
                                             - NOTE: IGNORING THIS CAN LEAD TO MEMORY LEAKS!
                                            Error Type: <type 'exceptions.OSError'>
                                            Error Contents: (2, 'No such file or directory')
                                            Traceback (most recent call last):
                                              File "/storage/.kodi/addons/script.light.imdb.ratings.update/resources/support/autoconf.py", line 216, in <module>
                                                php_configuration()
                                              File "/storage/.kodi/addons/script.light.imdb.ratings.update/resources/support/autoconf.py", line 152, in php_configuration
                                                os.rename( downloaded_file, php_cgi_binary )
                                            OSError: (2, 'No such file or directory')
                                            -->End of Python script error report<-- 


Check this path /storage/.kodi/userdata/addon_data/script.light.imdb.ratings.update/php-binary/php-cgi if there is binary, owner set and privileges. And maybe good first step is remove this file then reinstall PHP from addon config.

Also, check if download of this file on LibreELEC machine is working:
https://raw.githubusercontent.com/axlt20...5.6_x86_64

Then download above link and compare (md5sum) both binaries.