diff --git a/src/Error.cpp b/src/Error.cpp
index c22ddd0..149c77e 100644
--- a/src/Error.cpp
+++ b/src/Error.cpp
@@ -181,6 +181,8 @@ const std::vector<ErrorType> ts::avariableErrors = {
         {0x2202, "conversation_is_private"              , "the target conversation is private"                         },
         {0x2203, "conversation_not_exists"              , "the target conversation does not exists"                    },
 
+        {0x2300, "rtc_missing_target_channel"           , "the target channel does not exists"                         },
+
         {0x1200, "query_not_exists"                     , "query account does not exists"                              },
         {0x1201, "query_already_exists"                 , "query account already exists"                               },
         {0x1202, "query_too_many_simultaneously_sessions", "too many simultaneously connected sessions"                },
diff --git a/src/Error.h b/src/Error.h
index 36b0c02..3fd58e5 100644
--- a/src/Error.h
+++ b/src/Error.h
@@ -193,6 +193,8 @@ namespace ts {
             conversation_is_private = 0x2202,
             conversation_not_exists = 0x2203,
 
+            rtc_missing_target_channel = 0x2300,
+
             custom_error = 0xffff
         };
     };
diff --git a/src/PermissionManager.cpp b/src/PermissionManager.cpp
index e96c18a..7527b7a 100644
--- a/src/PermissionManager.cpp
+++ b/src/PermissionManager.cpp
@@ -108,10 +108,6 @@ deque<std::shared_ptr<PermissionTypeEntry>> ts::permission::availablePermissions
         make_shared<PermissionTypeEntry>(PermissionType::b_channel_create_with_topic, PermissionGroup::channel_create, "b_channel_create_with_topic", "Create channels with a topic"),
         make_shared<PermissionTypeEntry>(PermissionType::b_channel_create_with_description, PermissionGroup::channel_create, "b_channel_create_with_description", "Create channels with a description"),
         make_shared<PermissionTypeEntry>(PermissionType::b_channel_create_with_password, PermissionGroup::channel_create, "b_channel_create_with_password", "Create password protected channels"),
-        make_shared<PermissionTypeEntry>(PermissionType::b_channel_create_modify_with_codec_speex8, PermissionGroup::channel_create, "b_channel_create_modify_with_codec_speex8", "Create channels using Speex Narrowband (8 kHz) codecs"),
-        make_shared<PermissionTypeEntry>(PermissionType::b_channel_create_modify_with_codec_speex16, PermissionGroup::channel_create, "b_channel_create_modify_with_codec_speex16", "Create channels using Speex Wideband (16 kHz) codecs"),
-        make_shared<PermissionTypeEntry>(PermissionType::b_channel_create_modify_with_codec_speex32, PermissionGroup::channel_create, "b_channel_create_modify_with_codec_speex32", "Create channels using Speex Ultra-Wideband (32 kHz) codecs"),
-        make_shared<PermissionTypeEntry>(PermissionType::b_channel_create_modify_with_codec_celtmono48, PermissionGroup::channel_create, "b_channel_create_modify_with_codec_celtmono48", "Create channels using the CELT Mono (48 kHz) codec"),
         make_shared<PermissionTypeEntry>(PermissionType::b_channel_create_modify_with_codec_opusvoice, PermissionGroup::channel_create, "b_channel_create_modify_with_codec_opusvoice", "Create channels using OPUS (voice) codec"),
         make_shared<PermissionTypeEntry>(PermissionType::b_channel_create_modify_with_codec_opusmusic, PermissionGroup::channel_create, "b_channel_create_modify_with_codec_opusmusic", "Create channels using OPUS (music) codec"),
         make_shared<PermissionTypeEntry>(PermissionType::i_channel_create_modify_with_codec_maxquality, PermissionGroup::channel_create, "i_channel_create_modify_with_codec_maxquality", "Create channels with custom codec quality"),
@@ -508,10 +504,6 @@ i_group_modify_power,
         b_channel_create_with_maxfamilyclients,
         b_channel_create_with_sortorder,
         b_channel_create_with_default,
-        b_channel_create_modify_with_codec_speex8,
-        b_channel_create_modify_with_codec_speex16,
-        b_channel_create_modify_with_codec_speex32,
-        b_channel_create_modify_with_codec_celtmono48,
         b_channel_create_modify_with_codec_opusvoice,
         b_channel_create_modify_with_codec_opusmusic,
         i_channel_create_modify_with_codec_maxquality,
diff --git a/src/PermissionManager.h b/src/PermissionManager.h
index 87c7664..9b81be8 100644
--- a/src/PermissionManager.h
+++ b/src/PermissionManager.h
@@ -162,10 +162,6 @@ namespace ts {
             b_channel_create_with_topic,
             b_channel_create_with_description,
             b_channel_create_with_password,
-            b_channel_create_modify_with_codec_speex8,
-            b_channel_create_modify_with_codec_speex16,
-            b_channel_create_modify_with_codec_speex32,
-            b_channel_create_modify_with_codec_celtmono48,
             b_channel_create_modify_with_codec_opusvoice,
             b_channel_create_modify_with_codec_opusmusic,
             i_channel_create_modify_with_codec_maxquality,
diff --git a/src/Variable.h b/src/Variable.h
index acdf406..dc028a9 100644
--- a/src/Variable.h
+++ b/src/Variable.h
@@ -131,7 +131,7 @@ DEFINE_VARIABLE_TRANSFORM_TYPE(type, ntype)
 DEFINE_VARIABLE_TRANSFORM(class, VARTYPE_INT, std::to_string((size_type) in), static_cast<class>(in.as<size_type>()));
 
 DEFINE_VARIABLE_TRANSFORM(std::string, VARTYPE_TEXT, in, in.value());
-DEFINE_VARIABLE_TRANSFORM(std::string_view, VARTYPE_TEXT, std::string{in}, std::string_view{in});
+DEFINE_VARIABLE_TRANSFORM(std::string_view, VARTYPE_TEXT, std::string{in}, std::string_view{in.value()});
 DEFINE_VARIABLE_TRANSFORM(char*, VARTYPE_TEXT, std::string((const char*) in), (char*) in.value().c_str());
 DEFINE_VARIABLE_TRANSFORM(const char*, VARTYPE_TEXT, std::string((const char*) in), in.value().c_str());