This may be a symptom of your acknowledged problems with loading a saved game. This is a skirmish, 2 player one of which is AI. Had already saved and reloaded a couple of times, but then I started getting the error below. Seems new to Alpha 27, or I just did not stumble on it in 26. This is on Linux
PETRA.BasesManager.prototype.checkEvents@simulation/ai/petra/basesManager.js:175:7
PETRA.HQ.prototype.checkEvents@simulation/ai/petra/headquarters.js:118:20
PETRA.HQ.prototype.update@simulation/ai/petra/headquarters.js:2225:7
PETRA.PetraBot.prototype.OnUpdate@simulation/ai/petra/_petrabot.js:118:11
m.BaseAI.prototype.HandleMessage@simulation/ai/common-api/baseAI.js:64:7</p>
<p class="error">ERROR: JavaScript error: simulation/ai/petra/basesManager.js line 175
base is undefined
PETRA.BasesManager.prototype.checkEvents@simulation/ai/petra/basesManager.js:175:7
PETRA.HQ.prototype.checkEvents@simulation/ai/petra/headquarters.js:118:20
PETRA.HQ.prototype.update@simulation/ai/petra/headquarters.js:2225:7
PETRA.PetraBot.prototype.OnUpdate@simulation/ai/petra/_petrabot.js:118:11
m.BaseAI.prototype.HandleMessage@simulation/ai/common-api/baseAI.js:64:7</p>
<p class="error">ERROR: JavaScript error: simulation/ai/petra/basesManager.js line 175
base is undefined
PETRA.BasesManager.prototype.checkEvents@simulation/ai/petra/basesManager.js:175:7
PETRA.HQ.prototype.checkEvents@simulation/ai/petra/headquarters.js:118:20
PETRA.HQ.prototype.update@simulation/ai/petra/headquarters.js:2225:7
PETRA.PetraBot.prototype.OnUpdate@simulation/ai/petra/_petrabot.js:118:11
m.BaseAI.prototype.HandleMessage@simulation/ai/common-api/baseAI.js:64:7</p>
<p class="error">ERROR: JavaScript error: simulation/ai/petra/basesManager.js line 175
base is undefined
PETRA.BasesManager.prototype.checkEvents@simulation/ai/petra/basesManager.js:175:7
PETRA.HQ.prototype.checkEvents@simulation/ai/petra/headquarters.js:118:20
PETRA.HQ.prototype.update@simulation/ai/petra/headquarters.js:2225:7
PETRA.PetraBot.prototype.OnUpdate@simulation/ai/petra/_petrabot.js:118:11
m.BaseAI.prototype.HandleMessage@simulation/ai/common-api/baseAI.js:64:7</p>
<p class="error">ERROR: JavaScript error: simulation/ai/petra/basesManager.js line 175
base is undefined
PETRA.BasesManager.prototype.checkEvents@simulation/ai/petra/basesManager.js:175:7
PETRA.HQ.prototype.checkEvents@simulation/ai/petra/headquarters.js:118:20
PETRA.HQ.prototype.update@simulation/ai/petra/headquarters.js:2225:7
PETRA.PetraBot.prototype.OnUpdate@simulation/ai/petra/_petrabot.js:118:11
m.BaseAI.prototype.HandleMessage@simulation/ai/common-api/baseAI.js:64:7</p>
<p class="error">ERROR: JavaScript error: simulation/ai/petra/basesManager.js line 175