Forum Discussion

Copper Contributor

Mar 06, 2018

Unable to install SharePoint Apps

Since friday we've been unable to install our SharePoint App (AddIns). The installation fails with a message "The remote event receiver callout failed". This happened on multiple tenant, including th...

developer

paulpascha

Bronze Contributor

Mar 06, 2018

We ran into this issue as well. There is already another topic on this issue:

https://techcommunity.microsoft.com/t5/SharePoint-Developer/Invalid-issuer-o-signature-error-in-SPO-Provider-Hosted-AddIns/m-p/165204/highlight/false#M4433

jcgonzalezmartin

MVP

Mar 06, 2018

Yep, many customers are having this problem and while there are some workarounds described in GitHub, you could face under a scenario that is not covered by this workarounds: https://github.com/SharePoint/sp-dev-docs/issues/1409