bcbio-nextgen: Installation/upgrade error

I am running the installation script on top of a 1.1.4a installation and see

List of genomes to get (from the config file at '{'genomes': [{'dbkey': 'hg19', 'name': 'Human (hg19)', 'indexes': ['seq', 'twobit'], 'annotations': ['GA4GH_problem_regions', 'capture_regions', 'MIG', 'prioritize', 'dbsnp', 'hapmap', '1000g_omni_snps', 'ACMG56_genes', '1000g_snps', 'mills_indels', 'clinvar', 'cosmic', 'ancestral', 'qsignature', 'genesplicer', 'effects_transcripts', 'varpon', 'vcfanno', 'viral', 'transcripts', 'RADAR', 'rmsk', 'mirbase'], 'validation': ['giab-NA12878', 'platinum-genome-NA12878', 'giab-NA24385', 'giab-NA24631', 'giab-NA24143', 'giab-NA24149']}, {'dbkey': 'hg38', 'name': 'Human (hg38) full', 'indexes': ['seq', 'twobit', 'bwa', 'hisat2'], 'annotations': ['ccds', 'capture_regions', 'coverage', 'prioritize', 'dbsnp', 'hapmap_snps', '1000g_omni_snps', 'ACMG56_genes', '1000g_snps', 'mills_indels', '1000g_indels', 'clinvar', 'qsignature', 'genesplicer', 'effects_transcripts', 'varpon', 'vcfanno', 'viral', 'transcripts', 'RADAR', 'rmsk', 'mirbase'], 'validation': ['giab-NA12878', 'giab-NA24385', 'giab-NA24631', 'platinum-genome-NA12878', 'giab-NA12878-remap', 'giab-NA12878-crossmap', 'dream-syn4-crossmap', 'dream-syn3-crossmap', 'giab-NA12878-NA24385-somatic', 'giab-NA24143', 'giab-NA24149']}], 'genome_indexes': ['bwa', 'star', 'bowtie2', 'rtg'], 'install_liftover': False, 'install_uniref': False}'): Human (hg19), Human (hg38) full
Traceback (most recent call last):
  File "/rsrch3/scratch/bcb/bpeng1/bcbio/anaconda/bin/bcbio_nextgen.py", line 221, in <module>
    install.upgrade_bcbio(kwargs["args"])
  File "/rsrch3/scratch/bcb/bpeng1/bcbio/anaconda/lib/python3.6/site-packages/bcbio/install.py", line 105, in upgrade_bcbio
    upgrade_bcbio_data(args, REMOTES)
  File "/rsrch3/scratch/bcb/bpeng1/bcbio/anaconda/lib/python3.6/site-packages/bcbio/install.py", line 349, in upgrade_bcbio_data
    _upgrade_snpeff_data(galaxy_home, args, remotes)
  File "/rsrch3/scratch/bcb/bpeng1/bcbio/anaconda/lib/python3.6/site-packages/bcbio/install.py", line 418, in _upgrade_snpeff_data
    if os.path.exists(snpeff_db_dir) and _is_old_database(snpeff_db_dir, args):
  File "/rsrch3/scratch/bcb/bpeng1/bcbio/anaconda/lib/python3.6/site-packages/bcbio/install.py", line 445, in _is_old_database
    version_info = in_handle.readline().strip().split("\t")
TypeError: a bytes-like object is required, not 'str'
Traceback (most recent call last):
  File "bcbio_nextgen_install.py", line 287, in <module>
    main(parser.parse_args(), sys.argv[1:])
  File "bcbio_nextgen_install.py", line 44, in main
    subprocess.check_call([bcbio, "upgrade"] + _clean_args(sys_argv, args))
  File "/usr/lib64/python2.7/subprocess.py", line 542, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['/rsrch3/scratch/bcb/bpeng1/bcbio/anaconda/bin/bcbio_nextgen.py', 'upgrade', '--tooldir=/rsrch3/scratch/bcb/bpeng1/bcbio/share', '--genomes', 'hg19', '--aligners', 'bwa', '--genomes', 'hg38', '--aligners', 'star', '--aligners', 'bowtie2', '--data']' returned non-zero exit status 1

It looks like a typical python2/3 error because 1.1.4 uses python3 and 1.1.4a uses python2, but I do not know if this is caused by running a python2 script from 1.1.4a with the new python3.