Android Question Compliation error


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Hi Folks,

Need some help please in fixing the following error;

B4A Version: 10.0
Java Version: 8
Parsing code.    (0.06s)
Building folders structure.    (0.02s)
Compiling code.    (0.10s)
Compiling layouts code.    (0.01s)
Organizing libraries.    (0.00s)
    (Android Support Library)
Running custom action.    (0.23s)
Generating R file.    (0.00s)
Compiling generated Java code.    Error
javac 1.8.0_131
src\uk\gov\northhertsdc\ithelpdesk\ error: cannot find symbol
de.amberhome.objects.appcompat.ACActionBar _bar = null;
  symbol:   class ACActionBar
  location: package de.amberhome.objects.appcompat
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
1 error

Last compiled this project successfully about a year ago and now it won't compile. Nothing has changed as far as the code is concerned. In fact I wanted to use a new library (dgUID) to use some of it's functions and now have this issue. I've updated my SDK to latest release and unfortunately this has not fixed the problem. A bit puzzled what broke seeing I haven't changed it for almost a year. Any ideas?