Then I tried below.
Command line: java -Xmx16360m -jar beagle.28Jun21.220.jar
nthreads=2
gt=beagled_chr10.vcf.gz
excludemarkers=chr10_excluded_markers.txt
out=beagle_modified_chr10.vcf
No genetic map is specified: using 1 cM = 1 Mb
ERROR: invalid ALT allele at 10:2331141 [+]