Deat hpk,
first of all: thanx for this peace of software which can push using email to the next level !! 
here again the error-log when using the above-mentionned dev-version of DC:
device=samsung SM-G398FN (xcover4seea)
android=10 (G398FNXXS8BTJ3, QP1A.190711.020.G398FNXXS8BTJ3)
sdk=29
memory=7M (19.44% free, 512M max)
memoryClass=192
host=SWDI2013
applicationId=chat.delta.beta
app=Delta Chat 1.13.4-gplay-debug
installer=com.google.android.packageinstaller
ignoreBatteryOptimizations=false
notifications=true
reliableService=false
arch=64
bcc_self=0
blobdir=/data/user/0/chat.delta.beta/files/messenger.db-blobs
configured_mvbox_folder=
configured_sentbox_folder=
database_dir=/data/user/0/chat.delta.beta/files/messenger.db
database_version=69
deltachat_core_version=v1.46.0
display_name=0
e2ee_enabled=1
entered_account_settings=xxx.xxx@e.email imap: xxx.xxx@e.email::mail.ecloud.global:993:cert_automatic smtp:
xxx.xxx@e.email::mail.ecloud.global:587:cert_automatic 0
fingerprint=
folders_configured=0
inbox_watch=1
is_configured=0
journal_mode=wal
level=awesome
mdns_enabled=1
messages_in_contact_requests=0
mvbox_move=1
mvbox_watch=1
number_of_chat_messages=0
number_of_chats=0
number_of_contacts=0
private_key_count=0
public_key_count=0
selfavatar=
sentbox_watch=1
sqlite_version=3.33.0
uptime=0h 2m 2s
used_account_settings=unset imap:unset:0:unset:0:cert_automatic smtp:unset:0:unset:0:cert_automatic 0
hope that could help…