AttributeError: Can't get attribute 'RizzoSignatures'

[IlNevioIl]

Hello, Im using ida pro 7.7. I used the install.py script and it works fine, however when I try to load a .riz, I get this error log:

Applying Rizzo signatures, this may take a few minutes...
Generated 12802 formal signatures and 7800 fuzzy signatures for 19384 functions in 24.65 seconds.
Loading signatures from C:\Users***\Desktop\myfile.riz... Traceback (most recent call last):
File "F:/ida77/ida77/IDAPro7.7/plugins/rizzo.py", line 535, in activate
rizzo_load()
File "F:/ida77/ida77/IDAPro7.7/plugins/rizzo.py", line 515, in rizzo_load
RizzoApply(fname)
File "F:/ida77/ida77/IDAPro7.7/plugins/rizzo.py", line 498, in RizzoApply
s = r.load()
^^^^^^^^
File "F:/ida77/ida77/IDAPro7.7/plugins/rizzo.py", line 163, in load
sigs = pickle.load(fp)
^^^^^^^^^^^^^^^
AttributeError: Can't get attribute 'RizzoSignatures' on <module 'main' (built-in)>