Exception: cryptonote::DB_ERROR

[Foxi3]

Compiled on Raspberry Pi 4 4GB (Ubuntu 20.04.2 LTS). Successful compilation.
Run into error when running uplexad for the first time.

2021-04-09 17:48:38.981 ffffaba0f010 INFO global src/daemon/main.cpp:289 uPlexa 'Steadfast Storm' (v3.0.0-a9fd25367)
2021-04-09 17:48:38.981 ffffaba0f010 INFO global src/daemon/protocol.h:54 Initializing cryptonote protocol...
2021-04-09 17:48:38.981 ffffaba0f010 INFO global src/daemon/protocol.h:59 Cryptonote protocol initialized OK
2021-04-09 17:48:38.982 ffffaba0f010 INFO global src/daemon/p2p.h:64 Initializing p2p server...
2021-04-09 17:48:50.999 ffffaba0f010 INFO global src/daemon/p2p.h:69 p2p server initialized OK
2021-04-09 17:48:51.001 ffffaba0f010 INFO global src/daemon/rpc.h:64 Initializing core RPC server...
2021-04-09 17:48:51.002 ffffaba0f010 INFO global contrib/epee/include/net/http_server_impl_base.h:78 Binding on 127.0.0.1:22061
2021-04-09 17:48:51.002 ffffaba0f010 INFO global src/daemon/rpc.h:70 core RPC server initialized OK on port: 22061
2021-04-09 17:48:51.003 ffffaba0f010 INFO global src/daemon/core.h:87 Initializing core...
2021-04-09 17:48:51.004 ffffaba0f010 INFO global src/cryptonote_core/cryptonote_core.cpp:468 Loading blockchain from folder /home/foxi3/.uplexa/testnet/lmdb ...
2021-04-09 17:48:51.006 ffffaba0f010 WARN global src/blockchain_db/lmdb/db_lmdb.cpp:1214 The blockchain is on a rotating drive: this will be very slow, use an SSD if possible
Illegal instruction (core dumped)

Log file:

2021-04-09 17:37:27.320 ffff8b005010 WARN blockchain.db.lmdb src/blockchain_db/lmdb/db_lmdb.cpp:77 Error attempting to retrieve a hard fork version at height 0 from the db: MDB_NOTFOUND: No matching key/data pair found
2021-04-09 17:37:27.321 ffff8b005010 INFO stacktrace src/common/stack_trace.cpp:134 Exception: cryptonote::DB_ERROR
2021-04-09 17:37:27.321 ffff8b005010 INFO stacktrace src/common/stack_trace.cpp:135 Unwound call stack:
2021-04-09 17:37:27.326 ffff8b005010 INFO stacktrace src/common/stack_trace.cpp:173 [1] uplexad:__cxa_throw+0x128 [0xaaaad707b224]
2021-04-09 17:37:27.326 ffff8b005010 INFO stacktrace src/common/stack_trace.cpp:173 [2] uplexad+0x458bdc [0xaaaad72febdc]
2021-04-09 17:37:27.326 ffff8b005010 INFO stacktrace src/common/stack_trace.cpp:173 [3] uplexad:cryptonote::BlockchainLMDB::get_hard_fork_version(unsigned long) const+0x320 [0xaaaad73144a0]
2021-04-09 17:37:27.326 ffff8b005010 INFO stacktrace src/common/stack_trace.cpp:173 [4] uplexad:cryptonote::HardFork::init()+0x100 [0xaaaad7460aa8]
2021-04-09 17:37:27.326 ffff8b005010 INFO stacktrace src/common/stack_trace.cpp:173 [5] uplexad:cryptonote::Blockchain::init(cryptonote::BlockchainDB*, cryptonote::network_type, bool, cryptonote::test_options const*, unsigned long, std::function<epee::span const (cryptonote::network_type)> const&)+0x2cc [0xaaaad7355f64]
2021-04-09 17:37:27.326 ffff8b005010 INFO stacktrace src/common/stack_trace.cpp:173 [6] uplexad:cryptonote::core::init(boost::program_options::variables_map const&, char const*, cryptonote::test_options const*, std::function<epee::span const (cryptonote::network_type)> const&)+0xf44 [0xaaaad737125c]
2021-04-09 17:37:27.326 ffff8b005010 INFO stacktrace src/common/stack_trace.cpp:173 [7] uplexad:daemonize::t_core::run()+0x22c [0xaaaad70db844]
2021-04-09 17:37:27.326 ffff8b005010 INFO stacktrace src/common/stack_trace.cpp:173 [8] uplexad:daemonize::t_daemon::run(bool)+0x254 [0xaaaad70b6bfc]
2021-04-09 17:37:27.326 ffff8b005010 INFO stacktrace src/common/stack_trace.cpp:173 [9] uplexad:daemonize::t_executor::run_interactive(boost::program_options::variables_map const&)+0x38 [0xaaaad7157440]
2021-04-09 17:37:27.326 ffff8b005010 INFO stacktrace src/common/stack_trace.cpp:173 [10] uplexad:bool daemonizer::daemonizedaemonize::t_executor(int, char const**, daemonize::t_executor&&, boost::program_options::variables_map const&)+0x1cc [0xaaaad715fb94]
2021-04-09 17:37:27.326 ffff8b005010 INFO stacktrace src/common/stack_trace.cpp:173 [11] uplexad:main+0x115c [0xaaaad7082fd4]
2021-04-09 17:37:27.326 ffff8b005010 INFO stacktrace src/common/stack_trace.cpp:173 [12] /lib/aarch64-linux-gnu/libc.so.6:__libc_start_main+0xe8 [0xffff8d4fc090]
2021-04-09 17:37:27.326 ffff8b005010 INFO stacktrace src/common/stack_trace.cpp:173 [13] uplexad+0x1ed0a0 [0xaaaad70930a0]
2021-04-09 17:37:27.326 ffff8b005010 INFO stacktrace src/common/stack_trace.cpp:173

[Vaoske]

Some here, any solution?

Workaround:
Use a DB from a working Uplexad!Not stable!