ABS Module failure - cause?

[mnplus1556]

USA 2016 Ford Transit high roof extended 3.7L

I'm trying to figure out the cause for my ABS module to fail if anyone can help. here's what happened...
1. (Aug. 23) installed Rostra cruise control kit (250-9636). tested it out and it worked as intended
2. (Sep. 18) at home brake fluid flush/bleed. as far as i understand, i should have used an IDS device to properly bleed. i didn't know that the time of so just did it the traditional way with the key off and pumping the brake pedal.
3. (Sep. 19 - first time driving after brake job) hill start assist light and traction control light come on when engine started. after market cruise control no longer functions as intended.
4. went to O'Reilly auto parts to scan. got a ton of codes (P068A, U0001-88, U0422-68, C0037-11, U0100-00, U0101-00, U0151-00, C003A-11, C1109-24, & U0415-00).
5. brought it to Ford and they said my ABS module and RCM (restraint control module) failed and need to be replaced. "UPON DIAGNOSIS FOUND FAILED ABS MODULE INTERNAL ERROR RNR ABS AND MODULE". "REPLACED FAILED RCM INTERNAL FAULT".

so I see two possible causes...1. the after market cruise control did something (it's plugged into the OBD2 and gas pedal). 2. the incorrect brake bleed procedure caused the failure.

i have not plugged in the after market cruise since.

anyone with any knowledge on this would be greatly appreciated...

Thanks!