With larger file counts (50M, e.g.) encountering an issue with TypeError. This is not seen with small counts (14M, e.g.). Is there a a workaround for this?

This is running with 32 processes "fprof $DIR" and seeing:
Traceback (most recent call last):
File "/home/loewe/packages/pcircle-py3.9/bin/fprof", line 8, in <module>
sys.exit(main())
File "/home/loewe/treewalk-py3/local/miniconda3/envs/pcircle-py3.9/lib/python3.9/site-packages/pcircle/fprof.py", line 768, in main
circle.begin(treewalk)
File "/home/loewe/treewalk-py3/local/miniconda3/envs/pcircle-py3.9/lib/python3.9/site-packages/pcircle/circle.py", line 224, in begin
self.loop()
File "/home/loewe/treewalk-py3/local/miniconda3/envs/pcircle-py3.9/lib/python3.9/site-packages/pcircle/circle.py", line 257, in loop
self.task.process()
File "/home/loewe/treewalk-py3/local/miniconda3/envs/pcircle-py3.9/lib/python3.9/site-packages/pcircle/fprof.py", line 397, in process
self.handle_file_or_dir(spath, st)
File "/home/loewe/treewalk-py3/local/miniconda3/envs/pcircle-py3.9/lib/python3.9/site-packages/pcircle/fprof.py", line 487, in handle_file_or_dir
self.process_dir(spath, st)
File "/home/loewe/treewalk-py3/local/miniconda3/envs/pcircle-py3.9/lib/python3.9/site-packages/pcircle/fprof.py", line 328, in process_dir
self.circle.enq(entry.path)
File "/home/loewe/treewalk-py3/local/miniconda3/envs/pcircle-py3.9/lib/python3.9/site-packages/pcircle/circle.py", line 275, in enq
self.workq_init(self.dbname, G.resume)
File "/home/loewe/treewalk-py3/local/miniconda3/envs/pcircle-py3.9/lib/python3.9/site-packages/pcircle/circle.py", line 194, in workq_init
self.workq_db = DbStore(self.dbname, resume=G.resume)
File "/home/loewe/treewalk-py3/local/miniconda3/envs/pcircle-py3.9/lib/python3.9/site-packages/pcircle/dbstore.py", line 85, in __init__
(sqlite3.Binary(str(0)),))
TypeError: memoryview: a bytes-like object is required, not 'str'