Can't launch SC2 since latest patch

Mac Technical Support
I have not run SC2 on my mac for a couple of weeks. On attempting to play today I got an un expected fatal error has occurred message when launching (sometimes I see the screen go black then get it, sometimes I see a flash of loading screen, sometimes I see a tiny wee window appear then it happens)

I wondered if this was because I was on High Sierra so took the plunge and updated to Mojave but this has not helped.

About this mac:
System Software Overview:
System Version: macOS 10.14.3 (18D42)
Kernel Version: Darwin 18.2.0
Boot Volume: Macintosh HD
Boot Mode: Normal
Hardware Overview:
Model Name: MacBook Pro
Model Identifier: MacBookPro11,1
Processor Name: Intel Core i5
Processor Speed: 2.6 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache (per Core): 256 KB
L3 Cache: 3 MB
Memory: 16 GB

Latest crash report:
StarCraft II (B71663)

Executable /Applications/StarCraft II/Versions/Base71663/
<Parameters> -sso=1 -launch -uid s2_engb
Parent Executable /sbin/launchd
Grandparent Executable /sbin/launchd
LocalTime 2019-01-28 15:11:52.8064
<ComputerUser> dave
<ComputerName> David’s MacBook Pro
<Exe.Architecture> x86_64
<DataBuild> B71663
<CodeBranch> branches/SC2.2019Season1
<CodeRevision> 578821
<Locale.Assets> enUS
<Locale.Data> enUS
<Locale.Install> enUS
<AccountCountry> GBR
<Jira.JiraProjectKey> SC2
<Exception.ProjectId> 3
<BlizzardError.BuildNumber>B71663 (SC2.2019Season1)
<BlizzardError.Branch> branches/SC2.2019Season1
<Exception.Field2> SC2 Bug Staging
<BlizzardError.Priority>2 - High
<BlizzardError.Summary> SIGABRT Abort trap
<ErrorType> SIGABRT
<Application> StarCraft II
<InstanceID> 0

Abort trap

Thread ID:0

0 0x0000000000000000


0 0x0000000000000000


Manual Stack Trace (ID:0 Stack:0x0000000000000000 + 0)

0 0x0000000000000000

# Truncated for character limit

Any help much appreciated! I've tried reinstalling and repairing with no joy. I've disabled anti-virus (CyLance) for testing and no change.
It started to work again, no idea what was up. :shrug:

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