Are you seeing any plots at all?
And as it shows, the p-value should be below the Similarity test.
Wallace uses the R package `ecospat` to calculate and plot niche overlap. Try using the ecospat `ecospat.plot.overlap.test()` function outside of Wallace to see if it is working there, as the p-value display is built into the ecospat function, and not the Wallace interface.
To do this, you can download your session code using the Reproduce component [the analyses for environmental space will be at the end] and add:
ecospat::ecospat.plot.overlap.test(espace_nicheOv_Xx_Yy$simil, "D", "Similarity test")
If you are able to run niche overlap and then download the session code, you'll see this as the last line in the code. Note the Xx and Yy are placeholders here; they'll be different depending on your species.
Also, make sure your 'ecospat' package is updated. Version 4.0.0 is the current version on CRAN.
-Bethany
The Wallace Team