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Hi,
When I was trying the one-time password technical profile its failing. This is the error logged
Unable to cast object of type 'Web.TPEngine.Providers.OneTimePasswordProtocolProvider' to type 'Web.TPEngine.Providers.IProtocolProvider'
Appreciate your help.
Thanks,
Srinivas
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(51.2, 65%, 14%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EBT%3C/text%3E%3C/svg%3E)
Hi, SrinivasSripathi-8840 Please share the troubleshooting steps already undertaken.
I have added a basic technical profile in a user journey. It has simply thrown this error.
No troubleshooting steps done. Your development team can easily fix this.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(288, 44%, 37%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EBB%3C/text%3E%3C/svg%3E)
I am getting this exact same error. I've created a simple policy that just creates an OTP and sends it as a JWT claim. I built this because my full policy wasn't working and I didn't understand why, so I broke it down into the simplest thing I could test, which was generating the OTP.
My code is based on the tutorial for sending custom emails that @ahelland mentions and triple checked against the documentation. This error implies something more basic than a missed parameter or something. Seems like a type cast error is a programming error in 'Web.TPEngine.Providers.OneTimePasswordProtocolProvider', but perhaps the error message in Insights is misleading.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(259.20000000000005, 36%, 35%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAH%3C/text%3E%3C/svg%3E)
I used the OTP profiles here:
https://learn.microsoft.com/en-us/azure/active-directory-b2c/custom-email#add-otp-technical-profiles
I don't know the details of what you are trying to do, but this works for email at least. Could it be you have a typo or syntax error in the profile you have defined?