Hi,
Getting Null error without any server Trace. Please see below the verbose output:

No previous audit found. Omitting baseline
Cleaning project
Cleaning project srmuat
removing datastore.sqlite
Removed 1 files
Recreating database
Ignoring the following unknown rulesets : "Dead code"
Running project 'srmuat'
Running the following analysis : CompatibilityPHP53, CompatibilityPHP54, CompatibilityPHP55, CompatibilityPHP56, CompatibilityPHP70, CompatibilityPHP71, CompatibilityPHP72, Analyze, Preferences, Appinfo, Appcontent, Security, Custom, CompatibilityPHP73, CompatibilityPHP74, Inventory, Performances, Dead code, Suggestions, ClassReview, Rector, php-cs-fixable, Dump, Typehints
Producing the following reports : Ambassador
Running files
Check composer
Searching for files
Found 3721 files.
Removed 155 duplicates files
Check config files
Done
Cleaning DB
Restart gremlin server
stop gremlin server 3.4
Restarted in 0 rounds
started [219212] in 0.31 ms
Parallel processing
Loading with \Exakat\Loader\SplitGraphson
Child finished working
3566/3566 [==================================================================>] 100.00% 00:00:00
Init finalize
loading 1178458 definitions
loaded 1178458 definitions
loaded nodes (duration : 10,636.34 ms)
Cleaning CSV
Waiting for child
Finished waiting for child : 0.03814697265625 ms
Start load final
fixing Definitions for traits and interfaces
0 removed interface extends link
0 removed class extends link
0 removed class implements link
0 removed class implements link
fixing Fullnspath for Functions
1 fixed Fullnspath for Functions
Set 18734 functioncall fallingback
Set 0 extension functioncall fallingback
spotFallbackConstants
Link constant definitions : skipping.
Fixed Fullnspath for Constants

Error : :

=================== SERVER TRACE =========================
NULL

on file phar:///var/www/html/exakat/exakat.phar/vendor/brightzone/gremlin-php/src/Connection.php
on line 847

Exakat : @ 2014-2020 Damien Seguy.
Version : 2.1.5 - Build 1087 - Tue, 04 Aug 2020 17:25:58 +0000