Lightroom cc will not start

Question

I had a hard time with the installation but now lightroom  cc won't start!

Answer 1

Same here, there seems to be a licensing issue.
In %TEMP% amt3.log:
04/21/15 20:25:56:256 | [DEBUG] |  |  |  | AMT |  |  | 8436 | Feature LightRoom_Mini 6.0 is unlicensed (was unlicensed).
04/21/15 20:25:56:256 | [DEBUG] |  |  |  | AMT |  |  | 8436 | Feature LightRoom_Base 6.0 is unlicensed (was unlicensed).
04/21/15 20:25:56:256 | [DEBUG] |  |  |  | AMT |  |  | 8436 | Feature AMT_RESIDUAL_MODE 1.0 is unlicensed (was unlicensed).
04/21/15 20:25:56:256 | [ERROR] |  |  |  | AMT |  |  | 8436 | App has requested features but there are no licensed features, hence no license.
04/21/15 20:25:56:258 | [INFO] |  |  |  | config |  |  | 8436 | Enigma Data Found from SLCache
04/21/15 20:25:56:258 | [INFO] |  |  |  | config |  |  | 8436 | SSC LEID dir not found: C:\ProgramData\Adobe\ssc\V7{}PhotoshopLRCC-1.0-Win-GM
04/21/15 20:25:56:258 | [INFO] |  |  |  | config |  |  | 8436 | SSC LEID dir not found: C:\ProgramData\Adobe\ssc\V7{}PhotoshopLRCC-1.0-Win-GM
04/21/15 20:25:56:259 | [WARN] |  |  |  | config |  |  | 8436 | No resource directory found for domain __LIC_RESOURCE__
04/21/15 20:25:56:259 | [INFO] |  |  |  | config |  |  | 8436 | SSC LEID dir not found: C:\ProgramData\Adobe\ssc\V7{}PhotoshopLRCC-1.0-Win-GM
04/21/15 20:25:56:259 | [INFO] |  |  |  | config |  |  | 8436 | SSC LEID dir not found: C:\ProgramData\Adobe\ssc\V7{}PhotoshopLRCC-1.0-Win-GM
04/21/15 20:25:56:259 | [WARN] |  |  |  | config |  |  | 8436 | No resource directory found for domain __LIC_RESOURCE__
04/21/15 20:25:56:259 | [INFO] |  |  |  | AMT |  |  | 8436 | Deactivation or denial grace expiration of serial [960402361467984865728235].
04/21/15 20:25:56:259 | [DEBUG] |  |  |  | PCDService |  |  | 8436 | No value for key [ExpirationDate] in hive [V7{}Lightroom-6-Win-GM] in master : 10
04/21/15 20:25:56:260 | [INFO] |  |  |  | AMT |  |  | 8436 | Application licensing status has changed to unlicensed.
04/21/15 20:25:56:260 | [INFO] |  |  |  | AMT |  |  | 8436 | Validating client product info against cache.
04/21/15 20:25:56:260 | [DEBUG] |  |  |  | PCDService |  |  | 8436 | No value for key [ExpirationDate] in hive [V7{}Lightroom-6-Win-GM] in master : 10
04/21/15 20:25:56:260 | [INFO] |  |  |  | AMT |  |  | 8436 | Remaining duration changed from (was -1, now 21821637).
04/21/15 20:25:56:260 | [ERROR] |  |  |  | AMT |  |  | 8436 | Product is unlicensed.
04/21/15 20:25:56:260 | [INFO] |  |  |  | AMT |  |  | 8436 | Starting Data Collection for SWTag_Init()
04/21/15 20:25:56:262 | [INFO] |  |  |  | AMT |  |  | 8436 | DoISOTagging() productCanonicalLEID = V7{}Lightroom-6-Win-GM;outMappedLEID =  V7{}PhotoshopLRCC-1.0-Win-GM, unused =
04/21/15 20:25:56:262 | [INFO] |  |  |  | AMT |  |  | 8436 | DoISOTagging() productPayloadCode = {8048A5DF-8A70-5BE1-954B-E0FDE1BD0D0D};driverPayloadCode =  {8048A5DF-8A70-5BE1-954B-E0FDE1BD0D0D}
04/21/15 20:25:56:263 | [DEBUG] |  |  |  | PCDService |  |  | 8436 | Failed to read value for key [EPIC_APP_713] in hive [V7{}PhotoshopLRCC-1.0-Win-GM] from master : 5
04/21/15 20:25:56:263 | [INFO] |  |  |  | AMT |  |  | 8436 | SWTag_Init() Tags Arguments Adobe Lightroom; V7{}PhotoshopLRCC-1.0-Win-GM;
04/21/15 20:25:56:268 | [INFO] |  |  |  | AMT |  |  | 8436 | DoISOTagging() License Status = unlicensed
04/21/15 20:25:56:268 | [INFO] |  |  |  | AMT |  |  | 8436 | DoISOTagging() Tags 960402361467984865728235; 1.0; RETAIL
04/21/15 20:25:56:268 | [INFO] |  |  |  | AMT |  |  | 8436 | DoISOTagging() Product Version 1; 0
04/21/15 20:25:56:269 | [ERROR] |  |  |  | AMT |  |  | 8436 | ERROR: Failure Validating Product License!
04/21/15 20:25:56:269 | [INFO] |  |  |  | performance |  |  | 8436 | AMTValidateProductLicense took 483.328796 ms