[Huawei P20 Guides, News, & Discussion] yaazzz:
I really think something is going wrong with magisk. I can not remove the modules that I suspect to stop the boot as I do not have root access anymore :( here is the extract of errors inside of the logcat during boot :

04-02 00:13:56.611 2322 2322 E EffectsConfig: Failed to parse /vendor/etc/audio/audio_effects.xml: Tinyxml2 error (16): Error=XML_ERROR_MISMATCHED_ELEMENT ErrorID=16 (0x10) Line number=2: XMLElement name=audio_effects_conf
04-02 00:13:56.611 2322 2322 E EffectsConfig: Failed to parse /vendor/etc/audio_effects.xml: Tinyxml2 error (16): Error=XML_ERROR_MISMATCHED_ELEMENT ErrorID=16 (0x10) Line number=2: XMLElement name=audio_effects_conf
04-02 00:13:56.611 2322 2322 E EffectsConfig: Could not parse effect configuration in any of the default locations.
04-02 00:13:56.611 2322 2322 F libc : Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x0 in tid 2322 (audioserver), pid 2322 (audioserver)
04-02 00:13:56.625 2352 2352 I crash_dump64: obtaining output fd from tombstoned, type: kDebuggerdTombstone
04-02 00:13:56.625 725 725 I /system/bin/tombstoned: received crash request for pid 2322
04-02 00:13:56.626 2352 2352 I crash_dump64: performing dump of process 2322 (target tid = 2322)
04-02 00:13:56.628 2352 2352 F DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
04-02 00:13:56.628 2352 2352 F DEBUG : Build fingerprint: 'HUAWEI/CLT-L29/HWCLT:9/HUAWEICLT-L29/202C33R1:user/release-keys'
04-02 00:13:56.628 2352 2352 F DEBUG : Revision: '0'
04-02 00:13:56.628 2352 2352 F DEBUG : ABI: 'arm64'
04-02 00:13:56.628 2352 2352 F DEBUG : pid: 2322, tid: 2322, name: audioserver >>> /system/bin/audioserver <<<
04-02 00:13:56.628 2352 2352 F DEBUG : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x0
04-02 00:13:56.628 2352 2352 F DEBUG : Cause: null pointer dereference
04-02 00:13:56.628 2352 2352 F DEBUG : x0 0000000000000000 x1 0000007fe2672440 x2 0000000000000004 x3 0000000000000003
04-02 00:13:56.628 2352 2352 F DEBUG : x4 0000000000000000 x5 0004000000000000 x6 0000000000000000 x7 7f7f7f7f7f7f7f7f
04-02 00:13:56.628 2352 2352 F DEBUG : x8 0101010101010101 x9 2156b4c24a77a9a5 x10 0000007fe26725f0 x11 0000000000000046
04-02 00:13:56.628 2352 2352 F DEBUG : x12 0000000000000008 x13 ffffffffffffffff x14 ffffffffffffff00 x15 ffffffffffffffff
04-02 00:13:56.628 2352 2352 F DEBUG : x16 0000007ac5ea6ef0 x17 0000007ac7b9e990 x18 0000000000000001 x19 0000007fe2672bb1
04-02 00:13:56.628 2352 2352 F DEBUG : x20 0000007fe2672c40 x21 0000007ac5e8ad34 x22 0000000000000003 x23 000000000000000b
04-02 00:13:56.628 2352 2352 F DEBUG : x24 0000007fe2672bb1 x25 0000000000000000 x26 0000007fe2672b91 x27 0000000000000020
04-02 00:13:56.628 2352 2352 F DEBUG : x28 0000007ac5ea6b38 x29 0000007fe2672c20
04-02 00:13:56.628 2352 2352 F DEBUG : sp 0000007fe2672b60 lr 0000007ac5e88928 pc 0000007ac7b9e9a0
04-02 00:13:56.630 2352 2352 F DEBUG :
04-02 00:13:56.630 2352 2352 F DEBUG : backtrace:
04-02 00:13:56.630 2352 2352 F DEBUG : #00 pc 000000000001e9a0 /system/lib64/libc.so (strlen+16)
04-02 00:13:56.630 2352 2352 F DEBUG : #01 pc 0000000000001924 /system/lib64/libeffectsconfig.so (android::effectsConfig::parse(char const*)+556)
04-02 00:13:56.630 2352 2352 F DEBUG : #02 pc 0000000000011e40 /system/lib64/libaudiopolicyservice.so (android::AudioPolicyEffects::loadAudioEffectXmlConfig()+56)
04-02 00:13:56.630 2352 2352 F DEBUG : #03 pc 0000000000011d2c /system/lib64/libaudiopolicyservice.so (android::AudioPolicyEffects::AudioPolicyEffects()+192)
04-02 00:13:56.630 2352 2352 F DEBUG : #04 pc 000000000000b128 /system/lib64/libaudiopolicyservice.so (android::AudioPolicyService::onFirstRef()+628)
04-02 00:13:56.630 2352 2352 F DEBUG : #05 pc 00000000000038ec /system/bin/audioserver (android::BinderService<android::AudioPolicyService>::publish(bool, int)+120)
04-02 00:13:56.630 2352 2352 F DEBUG : #06 pc 0000000000003698 /system/bin/audioserver (main+232)
04-02 00:13:56.630 2352 2352 F DEBUG : #07 pc 00000000000adf40 /system/lib64/libc.so (__libc_init+88)
04-02 00:13:56.654 2352 2352 E crash_dump64: unable to connect to activity manager: Connection refused

Can someone post his /vendor/etc/audio/audio_effects.xml for comparaison?