Web AppBuilder Developer Edition - Can't create new Apps

[KieranO_Donnell2]

Hi all,

I've been using Web AppBuilder Developer Edition (1.2) since its release and have just run into a new error

I am unable to create any new Apps, as a blank box (like an error message would) appears with only the option to click Ok.
See screenshot below.

I have made a number of new apps with this latest Developer Edition of Web AppBuilder, and am still able to edit the existing apps.
This issue has only recently sprung up, and is seemingly random as nothing should have changed to create the problem.

Has anyone else experienced this problem?

Cheers,
Kieran

[RobertScheitlin__GISP]

Kieran,

   Can you check your browsers web console and tell us what error details are listed there?

[albavoli]

happen the same to me what is the problem

[RebeccaStrauch__GISP]

Kieran/Alba - how many is "a number of new apps"?  Maybe they is a limit in WAB?  (one I haven't hit yet).  I'm more curious about right now myself.  Or maybe a practical or physical limit of the machine?

A workaround might be to create a new instance of WAB (i.e., unzip the WAB download to a new folder and start a new version). Then "download" one of you developed apps and import it into the new version as a starting point (if it's the same version, you should be able to copy the folder over instead I think).  The problem of course with that is I think you will have to move all your custom widgets over again for any new apps (or copy over the folders in the <WAB>\client\stemapp folders.    I haven't tried this, but that is what I would try.

[KieranO_Donnell2]

Thanks Rebecca,

It does not seem to be the number of apps, as I have tried deleting a few, but there's no change.

This workaround seems to have worked. The problem happens intermittently though so hopefully it does not return.

Cheers

[MichaelRobb]

A much easier workaround is to simply Create a BASIC VIEWER.. it will run.  Then you will be able to create DEFAULT again without issue.

[KieranO_Donnell2]

Hi Robert, I can't see any errors

[KAnderson]

I had this same problem! I also couldn't duplicate an existing app.

I ended up doing what Rebecca suggested: downloaded all my map apps, archived the existing "arcgis-web-appbuilder-1.2" folder, re-installing, copied over the widgets from before, and then imported the zipped maps I was still working on.

It is a weird issue - for the first couple of days I had this problem, I could clear the cache, switch browsers, and/or restart the computer to get WAB back to running, but then all those options stopped working.

[JunshanLiu]

It looks strange, could you post your server log, browser console log, browser network log? Thanks!

[NathanielRoth1]

Any resolution to this? It's happening to me too.

I have both 1.1 and 1.2 installed, and they happily cohabitated since I installed 1.2 up until a short while ago, then 1.2 stopped letting me create new apps. 1.1 still works fine.

Using Chrome v46.0.2490.80m

When the empty message box is open, there is nothing except a XMLHttpRequest event deprecation notice.

Network log:

templatelist?portalUrl=http://cadoc.maps.arcgis.com	200	xhr	init.js:152	736 B	55 ms
flag_2d.png	200	png	init.js:128	1.9 KB	17 ms
thumbnail.png	200	png	init.js:128	3.9 KB	20 ms
thumbnail.png	200	png	init.js:128	4.6 KB	23 ms
thumbnail.png	200	png	init.js:128	3.9 KB	18 ms
flag_3d.png	200	png	init.js:128	1.9 KB	23 ms
comingsoon.png	200	png	init.js:128	9.3 KB	11 ms
thumbnail.png	200	png	init.js:128	3.9 KB	10 ms
self?f=json&token=Vwo5SGOH84cdc_TL9OkTFvuF80hZ2_jcFjiNl9eAJuI5yeGIWRkv2vjgHslS6QBIDuFncbsd2QSX5q_f86T58B6g4UjFvKvR0vp7V77ivNtxx4E557qzocGv6dvWG8GseW5oFO81p4_JJs1N3YVy-Hb7fpCGHz5IEPltbPxh8dhV6Bj1SIQ33EElyfqAbMCm&dojo.preventCache=1446045945389	200	xhr	init.js:152	4.5 KB	199 ms
self?f=json&token=Vwo5SGOH84cdc_TL9OkTFvuF80hZ2_jcFjiNl9eAJuI5yeGIWRkv2vjgHslS6QBIDuFncbsd2QSX5q_f86T58B6g4UjFvKvR0vp7V77ivNtxx4E557qzocGv6dvWG8GseW5oFO81p4_JJs1N3YVy-Hb7fpCGHz5IEPltbPxh8dhV6Bj1SIQ33EElyfqAbMCm&dojo.preventCache=1446045945393	200	xhr	init.js:152	4.5 KB	202 ms
getsignininfo?portalUrl=http%3A%2F%2Fcadoc.maps.arcgis.com	200	xhr	init.js:152	372 B	4 ms
loading.gif	200	gif	Other	970 B	3 ms
groups?f=json&q=title%3A%22ArcGIS%20Online%20Basemaps%22%20AND%20owner%3Aesri_en&token=Vwo5SGOH84cdc_TL9OkTFvuF80hZ2_jcFjiNl9eAJuI5yeGIWRkv2vjgHslS6QBIDuFncbsd2QSX5q_f86T58B6g4UjFvKvR0vp7V77ivNtxx4E557qzocGv6dvWG8GseW5oFO81p4_JJs1N3YVy-Hb7fpCGHz5IEPltbPxh8dhV6Bj1SIQ33EElyfqAbMCm	200	xhr	init.js:152	892 B	102 ms
search	200	xhr	init.js:152	1.6 KB	5.73 s
createapp	200	xhr	init.js:152	300 B	12 ms

Server Log:

[2015-10-28 08:19:01.686] [INFO] repo - Read repository items: C:\arcgis-web-appbuilder-1.2\client\stemapp\widgets

[2015-10-28 08:19:04.010] [INFO] repo - Read repository items: C:\arcgis-web-appbuilder-1.2\client\stemapp\themes

[2015-10-28 08:19:04.980] [INFO] server - Set isXT = true;