Hi Cuenca,
Please answer the following question. When you say that you installed the trial version of Dynamic Login and got the critical error does this mean that you got this error upon installing the module on your system through Host>Extensions? This path follows a install wizard. If you followed the wizard then your version of DNN could be the problem. What version of DL did you download for the trial?
At the
site link it says:
Dynamic Login 4.1 fully supports DotNetNuke 6.x! All Data Springs Modules support 4.x, 5.x, and 6.x platforms. Also, documentation on DL says Version 4.0 is supported against DNN 5.6.x and higher.
Thanks