This week's book giveaway is in the Programmer Certification forum. We're giving away four copies of OCP Oracle Certified Professional Java SE 11 Programmer I Study Guide: Exam 1Z0-815 and have Jeanne Boyarsky & Scott Selikoff on-line! See this thread for details.
I create an android app with kotlin, and i use a swager to get all WS
Among the ws, one for create a new user, but an error appear, I put it below
I want to know what's the mean of this error and how can I correct it
I need help please
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